I had the exact same issue the other day and had to set it again for a dialog, but I didn’t look further into it if it was something I was doing wrong or not.
Now that you say you got the same issue it feels like to me like it’s not intended behavior. The dialog sure is special by not being a “normal” composable, but these things should be propagated to it imo.
If you file a big I’ll +1 it, if you’re busy I can file the bug instead, whatever you prefer. That way we’ll know if this is WAI or not.